Indexes associated with information theory in water quality

Journal of the Water Pollution Control Federation

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Abstract

In many biological studies of water quality, a diversity index is calculated in 'bits per individual' by using Shannon's Approximation to Brillouin's Formula. Difficulties associated with such use of Shannon's Formula and its associated parameters are discussed. Recent research has indicated that diversity indexes can be improved if (a) biological sample collection and analysis are standardized prior to use for among various aquatic systems diversity indexes and their associated parameters, (b) the diversity index is measured in 'sits per individual' rather than the presently used unit of 'bits per individual,' and (c) the equation e=(H - H(min)/(H(max) - H(min)) is used to evaluate the uniformity of distribution of individuals among species in a sample where e equals relative evenness. Relative evenness, a ratio, is an expression in which Brillouin's and Shannon's Equations are not arbitrarily mixed. Values of diversity indexes using Brillouin and Shannon Formulas, both in bits and sits per individual, and relative evenness are given for 16 hypothetical samples.

Additional publication details

Publication type:

Article

Publication Subtype:

Journal Article

Title:

Indexes associated with information theory in water quality

Series title:

Journal of the Water Pollution Control Federation

Volume:

48

Issue:

8

Year Published:

1976

Language:

English

Publisher:

JSTOR

Larger Work Type:

Article

Larger Work Subtype:

Journal Article

Larger Work Title:

Journal of the Water Pollution Control Federation

First page:

2026

Last page:

2031

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